If it’s so important for the whole planet, why is no one paying Brazilians to keep the rainforests intact?
See, https://www.reuters.com/article/us-brazil-environment-norway...
The big issue is that developed countries need to pay far more money to stop other countries' deforestation, but it won't happen because the payments will affect QoL of those living in developed countries and humans are inherently selfish.
Brazilians received lots of money since 80's at least to help them to conserve the rainforests. It has not worked.
Maybe is time to start using the money in environmental projects in Europe or US instead. A couple of new national parks maybe?. Those would increase greatly the chance of success.